Fullerene Mediated Electrosynthesis of Au/C₆₀Nanocomposite

Abstract

C60 fullerene mediated electroreduction of Au(I) at potentials of the C60/C60•− redox couple was used to perform the electrosynthesis of an AuNP/C60 nanocomposite in DCB-DMF (2:1)/0.1 M Bu4NCl medium. The nanocomposite consists of separate gold nanoparticles with various shapes and a mean size of ∼27 ± 14 nm, as well as larger nanoaggregates of such particles, isolated in a fullerene matrix. The mean size of metal crystallites is 9–14 nm. The electrolysis occurs efficiently, and Au(I) is quantitatively reduced to Au(0) upon consumption of the theoretical amount of electricity. The resulting metal nanoparticles and the nanocomposite are not deposited on the electrode and are completely stabilized in the solution bulk. All the particles were characterized by electron microscopy methods (SEM, HR TEM) and X-ray powder diffraction (XRPD).

Fullerene Mediated Electrosynthesis of Silver Nanoparticles in Toluene-DMF

“…The results of this work in conjunction with prior data [31][32][33] indicate that fullerenes and their derivatives are very effective as mediators for the mediated electrosynthesis of AgNP and AuNP by reduction of monovalent M(I) ions at the potentials of the fullerene core reduction to the radical anion state. When M(I) ions are initially added into…”

“…Efficient mediated electrosynthesis of AuNP was performed by reduction of Au(I) in o-dichlorobenzene (DCB)-DMF (2:1)/0.1 M Bu 4 NCl medium using C 60 fullerene as a mediator at the potentials of the first stage of reduction to the radical anion. 31 The nanocomposite with individual AuNP stabilized in the mediator matrix was obtained as the result. A similar reduction in toluene-DMF (2:1) medium using C 70 , methano[60]fullerene, and [60]fulleropyrrolidine as a mediator results in stabilization of AuNP aggregates in the form of a "flower" rather than individual AuNP in the fullerene matrix.…”

“…13 The use of fullerenes as mediators in electrochemical reduction reactions of organic compounds, [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] oxygen, 29 nitrite ions 30 is based on the same property. Recently [31][32][33] we have shown that fullerenes and their derivatives can be used as mediators in the electrosynthesis of metal nanoparticles (MNP).…”

Mediated Electrosynthesis of Nanocomposites: Au Nanoparticles in Matrix of C70and Some Derivatives of C60Fullerene

“…Their preparation by thermal simultaneous evaporation of metal and fullerene from two crucibles and subsequent co-condensation, 12 thermal decomposition 13 or chemical reduction [9][10][11] of metal complexes in the presence of fullerenes and their derivatives is described. Recently, a Au/C 60 (in o-dichlorobenzene (DCB)/N,Ndimethylformamide (DMF) medium) 14 and Ag/C 60 (in two-phase DCB/water system) 15 nanocomposites were obtained by mediated electrochemical reduction of M(I) using C 60 as a mediator (Med) at the potential of the C 60 /C 60…”

Electrochemical method for producing globules of ultrasmall rhodium nanoparticles with poly(N-vinylpyrrolidone) bound to the surface of nanocellulose fibers

“…Possible MNP carriers include metal oxides, 1-12 polymers, 13-15 nanocellulose, 16-18 silica (SiO 2 ) NPs, [19][20][21][22][23][24] modifi ed carbon nanotubes, 25-27 oxidized graphene, 28, 29 and fullerenes. [30][31][32][33] Among the nanocarriers of diff erent nature, nanocellulose (NC) is of particular interest owing to high stability in aqueous and organic media, biodegradability, nontoxic character, and simplicity in preparation. 34 Metal NPs are not or very weakly attached to the surface of NC fi bers.…”